N
NA: Numerical Aperture.
NADF: North American Directory Forum.
nadir: The point which is diametrically opposite to the zenith and constitutes the lowest point of all.
nailed-up circuit: A circuit which is set up through a switching system to provide a semipermanent connection between two points.
NAK: Negative Acknowledgement.
NAM: Numerical Assignment Module.
name management: An aspect of configuration management, it allows the user symbolically to name and refer to resources on the network. Several techniques exist for this, the most popular being white pages and yellow pages.
NAMPS: Narrowband Advanced Mobile Phone System.
nanometre: One billionth of a metre.
nanosecond: One billionth of a second.
NANP: North American Numbering Plan.
narrowband: ...
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